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Noxco, thanks for joining the Processors community.
I’m glad to inform you that 2 Xeon processors will compensate and will exceed expectation on your system. Your system will increase performance, frequency, speed etc.
For example, the latest Intel® High End Desktop Processor the i7-5960x comes with 8 cores. Using 2 Xeon processors, you will have 16 cores instead.
Another plus with Xeon processors is that they support Intel QPI speed. QPI which is a point-to-point interconnect between the CPU and the integrated memory controller. http://ark.intel.com/products/83356/Intel-Xeon-Processor-E5-2630-v3-20M-Cache-2_40-GHz?q=E5-2630
Bear in mind that you will need to include a video card since these Xeon processors do not come with onboard video.
Noxco, we would recommend customers to use the correct memory on their system in order to avoid any problem on the future.
The use of memory out of specification could damage the processor. As you can see on the following link, this processor supports memory up to 1866 Mhz DDR4. http://ark.intel.com/products/83356/Intel-Xeon-Processor-E5-2630-v3-20M-Cache-2_40-GHz?q=2630
Even though Intel makes unlocked and Extreme Series processors that are robust enough to handle customizations, Intel doesn't recommend over clocking any of their internal components (memory, video or CPU) and there is no warranty support for that practice.
Usually, using memory out of specifications will decrease the lifetime of the processor and it could generate processor damage, however you are free to use the memory you prefer.
Also, respoding to the 2nd question, the E5-2630 v3 is a Server processors.